A special phototype model aeroplane of mass 400g has a control wire 8cm long attached to its body the other end of the control line is attached to afixed point .when aeroplane flies with its string wing horizontal in a horizontal circle 30degree above the horizontal .draw a diagram showing the four exerted on a plane and determine. a)Tension in the control wire b)the lift on the plane ( g=10m/s pie^2=10)
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Expert's answer
2020-02-13T08:54:26-0500
Write forces according to Newton's second law. Since the airplane is moving along a circumference with radius equal to the horizontal projection of the string, the net force is the centripetal force. Therefore:
Ox:T cos30∘=mrv2=ml cos30∘v2,Oy:T sin30∘−mg=0.
Solve that system of equations by expressing tension from the second equation first:
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